Westinghouse WBRU 80W Series Installation, Start-Up And Maintenance Instructions page 21


Intake pipe terminal must not terminate in areas that might contain combustion air contaminates, such as near swimming
pools.

For sidewall venting, the minimum horizontal distance between adjacent exhaust vent terminations is 1 foot. It is
recommended this distance be greater than 1 foot to better avoid frost damage to building surfaces.

For roof venting, minimum horizontal distance between any adjacent exhaust vent termination is 1 foot.

If the exhaust vent is to be terminated in a walled off area (such as a roof with a parapet wall), ensure the exhaust vent
terminates a minimum of 10' from nearest wall and extends level with or above the top of the wall. This will ensure flue gas
does not get trapped and possibly recirculated into the intake air pipe, which could contaminate the combustion air.
Figure 6 – Vent Termination Detail
A Clearance above grade, veranda, porch, deck, or balcony
B
Clearance to window or door that may be opened
C Clearance to permanently closed window
Vertical clearance to ventilated soffit located above the
D
terminal within a horizontal distance of 2 feet from the center
E
Clearance to unventilated soffit
F Clearance to outside corner
G Clearance to inside corner
Clearance to each side of center line extended above meter
H
/ regulator assembly
I
Clearance to service regulator vent outlet
Clearance to non-mechanical air supply inlet to building or
J
the combustion air inlet to any other boiler
K Clearance to a mechanical air supply inlet
L
Clearance above paved sidewalk or driveway
M
Clearance under veranda, porch, deck, or balcony
Table 8 – Vent Termination Clearances
*NOTE: For clearances not specified in ANSI Z223.1/NFPA 54 or CAN/CSA-B 149.1, please use clearances in accordance with local
installation codes and the requirements of the gas supplier.
DESCRIPTION
line of the terminal
US
1 foot
1 foot
*
*
*
*
*
*
*
1 foot
3 feet above if within 10 feet
horizontally
*
*
CANADA
1 foot
3 feet
*
*
*
*
*
3 feet with a height 15 feet
above meter / regulator
assembly
3 feet
3 feet
6 feet
7 feet
1 foot
WHL-032 REV. 6.2.16
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